Promax HD Ranger Lite, User Manual

Page: 137 / 184

July 2015
11
2
A1.1.6
Digital CABLE television signal of SECOND generation
(DVB-C2 standard/COFDM modulation)
DVB-C2 Parameters
►
Channel Bandwidth
It is the channel bandwidth between 6 MHz, 7 MHz and 8 MHz.
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Spectral inversion
It detects if the input signal has been inverted.
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Guard Interval
It corresponds to the dead time between symbols; its purpose is to detect
echoes due to multi-paths. This parameter is expressed in terms of the
symbol duration: 1/64 or 1/128.
►
Constellation
COFDM modulation with constellations QPSK, 16QAM, 64QAM, 256QAM,
1024QAM, 4096QAM. The constellation refers to all the selected PLP data.
►
Code rate
It defines the ratio between the number of data bits and the total number
of bits transmitted (the difference corresponds to the number of control
bits for the error detection and recovery): 2/3, 3/4, 4/5, 5/6, 8/9, 9/10.
►
DSLICE id
DSLICE identifier. A DSLICE is a data packet containing a group of several
PLPs.
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PLP id
PLP (Physical Layer Pipes) identifier. Layers are used by the system to
transmit compressed data such audio, video and more.